Re: What is TCPRenoRecoveryFail ?

[Nivedita Singhvi]

> I have a TCP connection that is sending bulk data from
> a Linux 2.4.17 machine to a client. At some point, one of
> the packets from the Linux machine is lost, so the client
> asks for a retransmit by acking the last received correct
> packet. Then the Linux machine just keeps filling the
> clients open window, ignoring that and subsequent
> retransmit requests, never retransmitting any data.

Windows and Linux dont agree on DSACK options in some
situations, leading to symptoms you describe sometimes..

You can try echoing 0 into /proc/sys/net/ipv4/tcp_dsack
and see if that avoids the stall (just to identify the problem,
this is not the real way to go..).

Stats and a trace would be useful..

> /BW

thanks,
Nivedita